怎么求的啊???

2012-03-08 22:31 来自版块 - 

10.在奥运比赛项目中,高台跳水是我国运动员的强项。质量为m的跳水运动员入水后受到水的阻力而竖直向下做减速运动,设水对他的阻力大小恒为F。那么在他减速下降深度为h的过程中,下列说法正确的是(g为当地的重力加速度)A.他的动能减少了Fh B.他的重力势能减少了mghC.他的动... 全文

2012-03-01 23:20 来自版块 - 

还有什么东西可以使四氯化碳褪色啊?求分析

2012-03-01 19:51 来自版块 - 

山东省临沂市2011年高三教学质量检测考试化学试题高考资源网也没有。。。。

2012-03-01 13:24 来自版块 - 

RT关于线性规划很多题,有时候没看出来怎么办啊

2012-02-28 23:20 来自版块 - 

已知定义在R上的函数y=f (x)满足下列三个条件:①对任意的x∈R,都有f(x+4)=f (x); ②对于任意的0≤x1<x2≤2,都有f(x1)<f(x2); ③y=f(x+2)的图象关于y轴对称,则下列结论中,正确的是(  )A、f(-4.5)<f(-1.5)<f(7... 全文

2012-02-28 23:18 来自版块 - 

Governor Mario’s chief intention in proposing the settlement was to _______. A.stop the Shoreham plant from going into operation B. help th... 全文

2012-02-28 20:39 来自版块 - 

Output is now six times ___________ it was before 1990. A. that B. what C .that which D .of that 详解~T

2012-02-28 20:35 来自版块 - 

The background music in an assembly line is designed ___________. A. not being listened to B .being not listened to C. not to be listened to... 全文

2012-02-28 20:27 来自版块 - 

So confused _________ that he didn’t know how to start his lecture. A.since he became B .would he become C. that he became D. did he become... 全文

2012-02-28 20:23 来自版块 - 

__________ she wondered if she had made a mistake. A. Not until long afterwards that B.Not long until afterwards C.It was not until long af... 全文

2012-02-28 19:50 来自版块 - 

The first textbooks ____ for teaching English as a foreign language came out in the 16th century. A.having written B. to be written C.... 全文

2012-02-28 19:38 来自版块 - 

求老师人性化的解答,,而不是复制一段定义来

2012-02-26 22:33 来自版块 - 

2012-02-26 21:08 来自版块 - 

这一块 今年还会不会考啊 话说、到处都是线性规划 需要做点题么?不是选修的么。。貌似很多题都涵盖了

2012-02-22 00:33 来自版块 - 

求垂直于直线2x-6y+1=0并且与曲线y=x3+3x2-5相切的直线方程

2012-02-22 00:28 来自版块 - 

已知函数f(x)=(x-k)^2*e^x/k 1、求f(x)的单调区间2、求对于任意x属于0至正无穷都有f(x)≤1/e 求k的范围

2012-02-22 00:26 来自版块 - 

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